Nexsys Modules - Crest Audio

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3 p.10 Features Overview Rear Panel - CKi 100s shown 1 Rear Panel 2 �� 3 �� + + �� + �� 1 Mains Breaker 2U & 3U amplifiers have a push-type circuit breaker, while 4U units have a throw-switch style breaker. If the unit’s breaker trips repeatedly, the amplifier needs servicing. 2 IEC Power Cord Connector On 2U amplifiers, a standard IEC power connector is located on the rear panel of amplifier.The connector accommodates a standard IEC line cord, included in the amplifier box. Should this cord need to be replaced, only a cord with the same current rating should be used. 3U & 4U units have a captive power cord. 3AC Mains / Active LED indicators The AC mains yellow LED indicates that the amplifier is attached to a power source.The active green LED indicates that the amplifier has been turned on and is operating. 4 Sequential turn on/off Connectors These connectors can be wired to a contact closure for remote turnon and to other CKi amplifiers for sequential turn-on (STO). 5 Fault I/O Connector This output is a contact closure that can be used to report a fault condition (e.g. an open output relay) in the amplifier. 6 + � � �� + + 4 5 7 12 13 8 9 0 ¡ �� Rear Panel Legend Ground Connected Ground Lifted Channel A stereo/parallel Bridged mono Channel B stereo/parallel Input Polarity Never connect a hot (red) output to ground or to another hot (red) output! a
Rear Panel cont. 6 Output Connectors A barrier strip provides output connection terminals for two speakers operating in stereo or parallel, for a single speaker wired in a bridged mono configuration,or for constant voltage distribution.Bare wire or spade lugs may be used to make barrier strip connections. 7 Ground Lift Switch This switch disconnects the audio ground from the chassis ground in the amplifier. 8 Module Bay All CKi amplifiers possess a module bay configured to accept interchangeable plug-in modules. Your amplifier may have been factory configured with a module. Information on all CKi modules is available in this manual. See – Chapter 7 NexSys <strong>Modules</strong> for more information. 9 Mode Select Switch This switch reconfigures the amplifiers outputs for stereo, parallel, or bridged operation.. 0 Input Attenuators Each channel has an attenuator knob to adjust the channel’s output from -∞ to maximum power. ¡ Status LEDs The “Protect,” “Signal,” and “ACL” LED’s on the rear panel serve the same function as the front panel LED’s of the same names.The “IGM” LED will light if the amplifier’s IGM protection circuit engages. 12 13 Input Connectors The CKi uses one 3-pin Phoenix connector per channel for balanced line-level audio input. These inputs can also be setup to accept an unbalanced signal. Gain (input sensitivity) Select Switch This switch sets the amplifier’s gain structure as constant sensitivity (0dB setting) or constant gain (x20 or x40 settings). Features Overview 3 Do not adjust the mode selection switch while the amplifier is turned-on. In situations where an UNBALANCED signal is fed to the amp, it’s important to ground the unused input. If the inverting (-) input of an amp channel is left floating, the gain will drop by 3 dB. a + p.11
Page 1 and 2: ��
Page 3: Important Safety Instructions WARNI
Page 6 and 7: 1 p.2 How to use this manual Introd
Page 8 and 9: 2 p.4 Installation Unpacking Upon u
Page 10 and 11: 2 p.6 Installation Cooling Requirem
Page 12 and 13: 3 p.8 Features Overview This chapte
Page 17 and 18: Choosing the appropriate mode / Swi
Page 19 and 20: Connecting the amplifier to AC powe
Page 21 and 22: Stereo Mode Direct Outputs A Parall
Page 23 and 24: Gain Select Switch The 3-position g
Page 25 and 26: The owner’s role in amplifier saf
Page 27 and 28: Protection Features CKi Series ampl
Page 29 and 30: General module information / Instal
Page 31 and 32: Module Features This following page
Page 33 and 34: Module Operation The following page
Page 35: NexSys Modules 7 p.31
Page 38 and 39: 8 p.34 Service, Support & Warranty
Page 40 and 41: p.36 Constant Voltage A distributed
Page 42 and 43: d p.38 Wire Gauge Stranded Cable Le
Page 44: http://www.crestaudio.com CKi TM Ow

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